builtin/difftool: use parse_oid_hex

diff --git a/builtin/config.c b/builtin/config.c
index 84385ef165195e7c65be54e9463cb49578bec2bb..98d65bc0ad4fd4bee8bd2755b9d7444d9862eae8 100644 (file)
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -164,7 +164,8 @@ static NORETURN void usage_builtin_config(void)
        usage_with_options(builtin_config_usage, builtin_config_options);
 }
 
-static void check_argc(int argc, int min, int max) {
+static void check_argc(int argc, int min, int max)
+{
        if (argc >= min && argc <= max)
                return;
        if (min == max)
@@ -598,7 +599,7 @@ int cmd_config(int argc, const char **argv, const char *prefix)
        int nongit = !startup_info->have_repository;
        char *value;
 
-       given_config_source.file = getenv(CONFIG_ENVIRONMENT);
+       given_config_source.file = xstrdup_or_null(getenv(CONFIG_ENVIRONMENT));
 
        argc = parse_options(argc, argv, prefix, builtin_config_options,
                             builtin_config_usage,